Look at the 4 slots and you will see that each one has an orange box around it with a trail that travels upwards and eventually goes off into its own direction. Solve each of the problems to reveal the symbol then track the 'orange road' down to the slots and that's where it goes! Rinse and repeat!
I think it is duck,tiger,dragon,snake. I'm just using my memory though. I am in the US area now, but nairby has a good answer thats how i figured it out :D
Nairby's answer is accurate. Each slot has a path going upwards, and in the middle is a grabbable pendulum. Hit R-trigger to hang onto it and it'll pull you into a whole new area with four branching paths, each one leads to that slot's answer. I do NOT know if it ever changes randomly or if it is static. No matter what though, I do not recommend skipping those steps...you're skipping most of the level (and at that point, why bother even playing the level?) and you're missing a ton of point bubbles and great items.
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